Its hard to say as its their first road electronic groupset. But for previous mechanical groups, they have typically 'supported' for the lifespan of the follow-up generation. As in spares for the 7700 set were not too difficult to source until after the 7900 was launched.

Typically Shimano will support a top end group for at least 3 or 4 years beyond it's replacement. My guess would be with the low production numbers of DA Di2 they'll be on the shorter side of time for support.

Typically Shimano will support a top end group for at least 3 or 4 years beyond it's replacement. My guess would be with the low production numbers of DA Di2 they'll be on the shorter side of time for support.

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